IET logo
 
IET
Decrease font size
Increase font size
Topic Title: DOL STARTER
Topic Summary: AUTO START
Created On: 14 January 2007 10:24 AM
Status: Post and Reply
Linear : Threading : Single : Branch
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 14 January 2007 10:24 AM
User is offline View Users Profile Print this message



REPTON66

Posts: 239
Joined: 13 March 2006

Good morning everyone can someone please tell me how i wire a dol starter to perform auto start when supply is present.I have to wire a commercial central heating pump from the above and the supply is via a timer control.
Do I short the start button out.
please forgive my ignorance but I have never fitted a dol starter before and am a bit green!
Regards Andy.
 14 January 2007 10:31 AM
User is offline View Users Profile Print this message


Avatar for OMS.
OMS

Posts: 19837
Joined: 23 March 2004

If the pump is operating under timed control the start button is simply replaced by the timeclock contacts

If the main electrical supply is given to you already under time control simply omit the start button contacts by means of a link

Be careful of the latter method - BS 7671 requires you to consider the risks of equipment automatically restarting following loss of voltage.

Personally, I would first determine the controls philosophy adopted and then work from there

Regards

OMS

-------------------------
Failure is always an option
 14 January 2007 11:35 AM
User is offline View Users Profile Print this message



REPTON66

Posts: 239
Joined: 13 March 2006

do the starters come complete with varied wiring configurations and links connected?
 14 January 2007 11:46 AM
User is offline View Users Profile Print this message


Avatar for rocknroll.
rocknroll

Posts: 8887
Joined: 03 October 2005

Yes they normally do, there are normally a couple of links, one you remove for remote operation, and often one you remove if you want to fit a float switch or similar control.

If you do a search you should find some DOL wiring diagrams on the net, they can be used for many applications.

OMS is right, be careful, weigh up the risks.

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------
 14 January 2007 06:03 PM
User is offline View Users Profile Print this message



REPTON66

Posts: 239
Joined: 13 March 2006

cheers for that I found some diagrams and now understand how the control circuit works simple series circuit.Just a bit ignorent of termonology.
REMOTE and local switched and float swich.
Statistics

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.